Acousto-Optic Scanning: Seeing Sound

Being able to visually interpret sound would be an extremely useful function, one that could aid people in the understanding of wave propagation and how those waves interact with each other. As well as this, visualising sound could aid loudspeaker design as manufacturers are able to more accurately study the interference patterns that determine the directivity and frequency response of their products.

Researchers at the National Physical Laboratory seem to have done just that, using a scanning laser Doppler vibrometer that can measure the minute changes in optical phase as the laser passes through an acoustic field.

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The Acoustics of the Epidaurus Theatre

Situated across the Saronic Gulf from Athens, the ancient greek city of Epidaurus is home to a 15,000 seat theatre that was once used for lavish dramas and banquets. It is well known for having remarkable acoustic properties, allowing voices from the stage to travel clearly to the very top row of seats, without amplification.

Researchers from Georgia’s Institute of Technology have discovered the science behind the Greek theatre’s incredible acoustics, carrying out in-situ measurements and using computer modelling to determine what effect the steep incline and unique layout have on the propagation of sound.

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The LDV: Laser Doppler Vibrometer

Solent Acoustics has recently acquired a laser doppler vibrometer!

Produced by Polytec, the PDV-100 is capable of non-contact velocity measurement from 0 to 22kHz with a range of around 30m. The laser itself is eye-safe, making it perfect for use in student projects. It is also very portable which allows us to carry out measurements in a wide range of locations, even with limited access.

The LDV can be used for almost any vibration measurement without providing an additional mass to the subject under test as an accelerometer would. This increases the accuracy of vibration measurements while also allowing us to investigate things not possible with accelerometers, such as the sound of a spiders mating dance!

For more information on the PDV-100 read the data sheet provided by Polytec, found here: http://goo.gl/wisNsw

Tour Our Facilities

Here at Southampton Solent University we were lucky enough to have a brand new hemi-anechoic chamber opened on May 2013. Take a look around in the interactive street-view image below, or hit continue reading to see some higher quality images of our equipment.

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Acoustics in the Built Environment – 1 Day conference, Friday 4 April 2014.

Solent Acoustics are pleased to announce our next professional conference, “Acoustics in the Built Environment”.

Following on from the success of last year’s conference “Noise in Music and Entertainment”, this one day event targets professionals in the Built Environment sector who would like to learn more about the acoustic issues faced by building projects from design to construction and beyond.

The event will involve presentations from 4 prominent keynote speakers, along with an open questions panel, and will be relevant to Architects, Architectural Technologists, Building Control Officers, Chartered Surveyors, Environment Health Officers, Health and Safety officers and Site Managers as well as Acousticians.

Subjects covered will include:

  • What makes a building fail on pre-completion testing and how to prevent it.
  • Legislative requirements and issues for conventional and unusual builds (non-domestic issues, listed buildings, ‘common’ spaces in apartment buildings).
  • Noise and noise monitoring in construction and demolition sites
  • Acoustic issues in specialist and non-domestic buildings (Aesthetics, Acoustic Privacy, Technological Solutions).

Speakers:

  • Nick Jones (Hilson Moran)
  • Phil McIlwain (Wisemill Acoustics)
  • Kyriakos Papanagiotou (KP Acoustics)
  • Jonty Stewart (Wight Noise)

Click here to find out more about our keynote speakers.

The event will take place at the Solent Conference Centre, Southampton Solent University, on Friday 4 April 2014.

Registration is free for delegates, and includes conference pack, trade exhibition, coffee and lunch. CPD certification is offered for the event.

Register quickly and easily:

Eventbrite - Acoustics in the Built Environment Conference

Event Gold Sponsor:

KPAcoustics

And partnered with:

Option 2wight noise logo

 Westminster CC colour logo

Also Sponsored by:

Acoustic1 revised

PCEnvironmental

AET GB Ltd logo

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